If you run out of Bayou Patout and cross the intracoastal to go into Weeks bay you will know immediately if your boat is not enough to take the seas in the bay. The water where Patout crosses the GIWW will or won't be too rough to cross into the bay.
If you can't get into the bay there but can get into the GIWW go East and there is a short bayou that you can use to get into the bay.
Once in the bay fish the north bank on a high tide with a spinner bait for reds. Or any other method that is normally used. If the bay is calm, go to the end of the land further south called Mud Point. Sometimes there are trout to be caught there. The usual methods will have to be tried to see what they are biting on. Usually there will be some boats parked where the fish are to be found.
I don't know much about Stumpy Bayou but you can go past the turn to Cypremort and go to Daniel Edgar's boat launch into the Port of West St. Mary. Go out to the intracoastal, take a left and the next right puts you in the Ivanhoe Canal to Vernilion Bay. I have a 14 flat and that's where I fish. I've caught reds, bull sharks, croakers and stingrays there. Today my wife caught a 21 inch red and a giant black drum there.